From: Jiri Pirko <[email protected]> I am owner of height adjustable desk and naturally, as it has an USB interface, I need to controll it from my computer. Started to think about what would be the best way, I realized that I need to introduce a new driver class in kernel. The reason is a need to have one API for all possible kinds of actuator devices (USB, I2C, gpio, etc).
So the first patch introduces generic actuator device class. Please see the patch description for more info. Basically it allows device drivers to register actuators providing set of ops. Also it exposes actuator manipulation possibilities via generic Netlink interface to userspace. The second patch introduces driver based on the actuator driver class for Linak USB2LIN device. I created a library which wraps-up the generic netlink API so it could be easily used by applications. The library comes with a utility called "act" which can be used to manipulate the actuator devices. It has iproute2 command line and stdout syntax. Here there are couple of examples: $ act dev show usb/1-2/0: driver_name usb2lin type linear units um value 70200 move_state stopped $ act dev move usb/1-2/0 value 100000 $ act dev stop usb/1-2/0 You can monitor the actuator status changes: $ act mon get: usb/1-2/0: driver_name usb2lin type linear units um value 70300 move_state positive get: usb/1-2/0: driver_name usb2lin type linear units um value 99900 move_state stopped get: usb/1-2/0: driver_name usb2lin type linear units um value 100300 move_state negative get: usb/1-2/0: driver_name usb2lin type linear units um value 10100 move_state stopped get: usb/1-2/0: driver_name usb2lin type linear units um value 10500 move_state positive get: usb/1-2/0: driver_name usb2lin type linear units um value 99900 move_state stopped The libactuator is available here: https://git.kernel.org/pub/scm/linux/kernel/git/jpirko/libactuator.git/ This patchset is based on current net-next git tree. I apologize, I'm not used to send patches outside netdev subsystem so please tell me on top of which tree to rebase this if neede and who to cc. Thanks! Jiri Pirko (2): add support for generic actuator devices actuator: introduce Linak USB2LIN cable support MAINTAINERS | 7 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/actuator/Kconfig | 26 +++ drivers/actuator/Makefile | 2 + drivers/actuator/actuator.c | 410 +++++++++++++++++++++++++++++++++++++++ drivers/actuator/usb2lin.c | 433 ++++++++++++++++++++++++++++++++++++++++++ drivers/hid/hid-core.c | 1 + drivers/hid/hid-ids.h | 3 + include/linux/actuator.h | 43 +++++ include/uapi/linux/actuator.h | 74 ++++++++ 11 files changed, 1002 insertions(+) create mode 100644 drivers/actuator/Kconfig create mode 100644 drivers/actuator/Makefile create mode 100644 drivers/actuator/actuator.c create mode 100644 drivers/actuator/usb2lin.c create mode 100644 include/linux/actuator.h create mode 100644 include/uapi/linux/actuator.h -- 2.9.3
